Ray-Ban Square Sunglasses Acetate Frame. Acetate is a plant-based plastic known for being lightweight, yet durable. Made in US Plastic frame Crystal lens Polarized 100% UV protection coating Lens width: 55 millimeters Lens height: 45 millimeters Bridge: 15 millimeters Arm: 145 millimeters Flat-top boyfriend-inspired sunglasses with non-polarized lenses and logoed temples Glasses might not sit completely flat. Slight adjustments to the shape and curvature of the sunglasses arms may be needed to get a custom fit. Adjustments should be made by a professional. Ray-Ban products include an etched "RB" on the left lens. The RB is not a scratch or defect.